Definitions

attest

[uh-test] / əˈtɛst /

VERB

affirm, vouch for

Synonyms

STRONGEST

authenticate corroborate demonstrate indicate substantiate swear verify

STRONG

adjure announce argue assert aver certify confirm countersign declare display exhibit prove ratify seal show support sustain testify uphold warrant witness

WEAK

asseverate bear out bear witness give evidence

Antonyms

STRONGEST

conceal disprove hide

STRONG

abstain contradict cover deny disavow discredit invalidate oppose refuse reject repudiate veto withhold

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Hugo and his fellow Year 10 French students can attest to the success of this method.

From BBC • Apr. 18, 2026

It isn’t that “V-shaped” rebounds like what investors just witnessed don’t happen — they clearly do, as anybody who held on through last April’s tariff tantrum can no doubt attest.

From MarketWatch • Apr. 16, 2026

Maybe I was feeling pressure to maybe push to be interesting — that’s all I can attest it to.

From Los Angeles Times • Mar. 24, 2026

But as a generation of buyers can attest, these hard-revving little gassers suffered a host of maintenance, reliability and durability issues.

From The Wall Street Journal • Feb. 6, 2026

The Ellens could attest that in fifteen years, Minya’s will had never faltered, not even in her sleep.

From "Strange the Dreamer" by Laini Taylor

Vocabulary lists containing attest

100 SAT Words Beginning with "A"

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Posted

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

The Ancient Period, Before 600 BCE

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!